Replace scoped_ptr with unique_ptr in webrtc/voice_engine/

webrtc/voice_engine/network_predictor.h

Index: webrtc/voice_engine/network_predictor.h
diff --git a/webrtc/voice_engine/network_predictor.h b/webrtc/voice_engine/network_predictor.h
index b35ccd8756849c11ebb0a6aa183f9acc3d0aa407..bf08fe98ce2dbd000734310aa10b6cc05d506aa5 100644
--- a/webrtc/voice_engine/network_predictor.h
+++ b/webrtc/voice_engine/network_predictor.h
@@ -11,6 +11,8 @@
 #ifndef WEBRTC_VOICE_ENGINE_NETWORK_PREDICTOR_H_
 #define WEBRTC_VOICE_ENGINE_NETWORK_PREDICTOR_H_
 
+#include <memory>
+
 #include "webrtc/base/exp_filter.h"
 #include "webrtc/system_wrappers/include/clock.h"
 
@@ -38,7 +40,7 @@ class NetworkPredictor {
   int64_t last_loss_rate_update_time_ms_;
 
   // An exponential filter is used to predict packet loss rate.
-  rtc::scoped_ptr<rtc::ExpFilter> loss_rate_filter_;
+  std::unique_ptr<rtc::ExpFilter> loss_rate_filter_;
 };
 
 }  // namespace voe